The other day, my brother drove his car down the street at ________ I thought was a dangerous speed. 
#74018
A
as
B
which
C
what
D
That
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I wouldn't manage to do it___ you had explained how.
#73583
A
unless
B
until
C
when
D
since
I have two grammars, ______are of great use. 
#73806
A
all of which
B
either of which
C
both of that
D
both of which
I’ve already told you that I’m going to buy it, ________.
#67719
A
how much does it cost
B
no matter how it costs
C
however does it cost much
D
however much it costs
The engineer ______my father works is about 50 years old. 
#73792
A
to whom
B
on whom
C
with which
D
with whom